Gas turbine system

Abstract

A gas turbine system, in particular for a utility power plant, includes a combustion chamber (2), which at least in an annular outlet region (6) having a chamber inner wall (7) and a chamber outer wall (8), radially delimits a combustion chamber gas path (9), a turbine (3), which at least in a stationary annular inlet region (10) having a turbine inner wall (11) and a turbine outer wall (12), radially delimits a turbine gas path (13), a radially inward and/or radially outward axial gap (4; 16, 17) between the combustion chamber (2) and the turbine (3), at which gap the inner and/or outer chamber wall (7, 8) and the inner and/or outer turbine wall (11, 12) end, and a cooling gas supply (5), which via the gap (4; 16, 17) introduces a cooling gas into the turbine gas path (13) and/or into the combustion chamber gas path (9). To increase the efficiency of the gas turbine system (1), an end section (21, 22, 23, 24) of the respective turbine wall (11, 12) and/or of the respective chamber wall (7, 8) adjoining the gap (4; 16, 17) is radially inwardly and/or radially outwardly formed in such a way that in the circumferential direction at the gap (4; 16, 17), positive stages (a, c) in which the respective wall (11, 12) situated downstream radially projects into the respective gas path (9, 13) with respect to the respective wall (7, 8) situated upstream, and negative stages (b, d) in which the respective wall (7, 8) situated upstream radially projects into the respective gas path (9, 13) with respect to the respective wall (11, 12) situated downstream, alternate.

Dependencies are inferred from the claim text.